Fire-grate.



H. BENTON.

FIRE GRATE.

APPLICATION FILED 0GT.28, 19.14.

1,131,461. Patented M51119, 1915.

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l/VVEA/TUR fle/z/f flew/o BY A7TOHNEYS THE NORRIS PETERS 60.. PHQTO-LITHQ. WASHINGTON. D. 61

H. BENTON.

FIRE GRATE. APPLICATION FILED 001228, 1914.

1,131,461 Patented Mar.9,1915.

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WITNESSES mum/rm? fie/7y Ben/0n A FOR/V578 THE NORRIS PETERS CO PHOTO-LITHQ, WASHING rON, D. C

nwirnn snares HENRY BENTON, 01E ELIZABETH, NEW J IEIRE-GRATE.

Specification of Letters Patent.

Patented Mar. 9, 1915.

Application filed Detober 28, 1914. Serial No. 868,991.

To allow/10m it may concern:

Be it known that I, :HENRY BENTON, a citizen of the United States, and a resident of Elizabeth, in the county of Union and State of New Jersey, have invented a new and Improved Fire-Grate, of which the following is a full, clear, and exact description.

Among the principal objects which the present invention has in view are: to provide a structure of the character claimed, adapted to facilitate the removal and renewal of destructible portions; to provide simple and efficient means for dumping certain portions of the fire-bed; to provide a simplified and durable construction for regulating the movement of the fire supporting members of the grate bar, and to provide a simplified means for installing grates and bars therefor.

Drawings: Figure 1 is a vertical longi tudinal section of a grate constructed and arrangedv in accordance with the present invention, the section being taken as on the line 11 in Fig. 1. Fig. 1 is a cross-section taken as on the line 11 in Fig. 1; Fig. 2 is a vertical longitudinal section of a fragment of the grate showing a section thereof in uptilted or dumping position; Fig. 3 is a detail view in perspective showing fragments of a supporting frame memher, a swinging bar and auxiliary guard rail for the same; Fig. 4 is a detail view in perspective of a check plate forming one of the members of a cradle for the grate bars and parts connected therewith; Fig. 5 is a detail view in perspective of a fragment of one of the grate bars; Fig. 6 is a detail view in vertical crosssection, the section being taken as on the line 6-6 in Fig. 1; Fig. 7 is a detail view showing a cross-section of the grate bar and the side view of a supporting clip therefor, the section being taken on line 77 in Fig. 6.

When constructing a grate in accordance with the present invention, one or more structural units are employed. Each unit has two dogs provided each with legs 16, and in service disposition lengthwise of the fire-box in which the grate is mounted. The dogs 15 are transversely united by the tie-bars 17. The fire-bed is in part formed by the filler-bars 18 which cross between the dogs 15 at the rear of the grate-bars and above the tie-bars 17 The shelf 19 is a part of the fire-box structure and regulates the height of the grate-bars which are designed to support the fire-bed at a level with the said shelf. The shelf 19 is preferably integral with the face plate 20, which is provided with openings 21 through which pass the link-bars 22 and 23. The links 22 and 23 are upwardly connected with the socket toggle levers 2i and 25. The toggle levers 24 and 25 are provided with conventional links 26 by which they are pivotally connected with the face plate 20. The toggle levers 2 1 and 25 are operated by a bar 27, when disposed therein, as shown best in Fig. l of the drawings.

The link bars 22 and 23 are pivotally and operatively connected with the swinging connector-bars 28 and 29. The connectorbars 28 and 29 are similar in construction and are each pivotally attached to a series of grate-bars 30, each grate-bar being provided with trunnions 31 extended from the lower end of the pendant arms 32, with which each bar is provided, as seen best in Figs. 1 and 5 of the drawings. The bars 2?, 22, 23 and 29 are normally employed to shake or rock the grate-bars 30, with which they are connected. For this purpose the grate-bars 30 rest upon the upper edge of the cheek plates 33, provided to support the same. Said bars are normally held in placed relation by the rider-bars 34. The bars 34 are each provided with a series of recesses 35, which recesses are fitted over the upper edges of the grate-bars 30, and of the extensions 36 at the ends thereof. The rider bars are free to move in perpendicular relation to the cheek plates 33, but are held against movement lengthwise thereof by the said shaft 37. To engage the shaft 37 the said bars are provided with a slot 38. The rider-bars 34 are dropped into position from above after the grate-bars 30 are installed. The recess 35 of the said rider-bars thereafter operates to retain the grate-bars in their proper correlation, to avoid the disadjustment thereof and the grinding of the ends of the sectors 39.

The rider-bars 34 as seen best in Fig. 1 of the drawings, have an apron extension 40. At the back of the extension 40 are extended two spaced lugs 41, the function of which is to infold the suspension arms 42, as shown best in Fig. 1 of the drawings. The suspension arms 4-2 are pivotally mounted on the said shafts 37 and serve as supports for the T-bars 43, which serve as supports for the independent grate sections. Said T-bars are rigidly connected at the lower end of oppositely disposed suspension arms 42, and they are rigidly bolted to the companion cheek plates 33, said cheek plates being each provided with a short bolting flange 44. This construction is best seen in Fig. 1 of the drawings.

As'shown best in Fig. 4 of the drawings, each of the cheek plates 33 is provided with a series of quadrant guide ridges 45. The ridges 45 have each a stop lug 46 disposed at the rear ends thereof. When the grate bars 30 are assembled in service relation to the cheek plates 33, each of the ridges 45 are disposed within one of the slots 47. The slots 47 are best shown in Fig. 5 of the drawings. Extended within the upper edge of the slots 47 are end extensions 48 provided to form sliding surfaces for the gratebars when moved back and forth over the ridges 45. The under surface of the extensions 48 and top edge of the slot 47 are curved to correspond with the curvature of the ridges 45.

To install the grate-bars 30 after the T- bars and cheek plates have been set, the said grate-bars are disposed on the upper edges of the cheek plates 33. The bars are shifted until the slots 47 coincide with the ridges 45 when the bars 30 and pendant arms 32 there of are swung to vertical positions. The con nector-bars 28 and 29 are arranged to receive in perforations provided therein, the trunnions 31 at the end of each of said pendant arms 32. The inner ends of the link bars 22 and 23 are now operatively connected by the pivot pins 49 with bracket extensions 50 depending from the said connector bars 28 and 29.

It is to avoid binding the ridges 45 in the slots 47 that the bracket arms 51 are provided with curved slots, the curvature of said slots corresponding with the curvature of the ridges 45. The movement of the pins 49 and the connector-bars 2S and 29 connected therewith, secure to the trunnions 31 a path of movement concentric with each of the ridges 45. In this manner the jamming and cramping incident to the rocking of the grate-bars is avoided. The bracket arms 51 are rigidly bolted to the perpendicular flange of the T-bars 43.

As best shown in Fig. 3 of the drawings, each of the dogs 15 is provided with an abutment 53, which serves as stop members for the arms 42. The abutments 53 prevent the movement of the arms 42 and the bar 43 in a forward direction only. The said arms and bar, together with the parts connected therewith, are freely movable in a rearward direction away from the said abutments. Thismovement of the said arms and T-bar is imparted when the link-bars 22 and 23 are moved inwardly over the pins 49 for engaging the rear end of the slots 52 in the bracket arms 51. From this moment the inward movement of the said link-bars causes the whole grate section including the gratebars 30 and sectors 39 to swing on the stud shafts 37, as a pivot, until disposed in the position. shown in Fig. 2 of the drawings. This is the dumping position for each grate section, which position is assumed by each of the sections independently. It will be noted that when the T-bars 43 and cheek plates carried thereby, are so moved, the grate-bars 30 are held rigidly in their service position or in positions perpendicular to the upper ec ges of the cheek plates 33.

Each of the grate-bars 30 is provided with a series of grate sectors 39. The sectors 39 are provided to immediately support the fire-bed. In the present invention the sectors 39 are removably attachedto the gratebars 30. For this purpose each of the gratebars is provided on one side thereof, with a series of inclined ridges 54 regularly spaced apart to form grooves or inclined run-ways 55 on the vertical sides of the T-bars.

The sectors 39 are shaped as shown best in Figs. 6 and 7 of the drawings, and are each provided with a central opening 56.

The opening 56 has a contracted entrance.

formed by a portion 57 of the body of the sectors, which registers with and passes through the run-ways 55, when the sectors are inclined, as shown at the right of Fig. 6 of the drawings. The dimensions of the opening 56 are ample to admit the bar 30 and the ridges 54 mounted thereon. The

ridges 54, as seen best in Fig. 7 of the draw- 7 ings, are shortened to provide a run-way adjacent to the lower edge of thebar 30, for the passage of the portion 57, thus permitting the sectors 39 to be freely adjusted lengthwise of the bars 30.

The sectors 39 are provided on both faces with button extensions 58. The button extensions 58 constitute separators for the sec-- tors 39, or limit the degree of juxtaposition of said sectors, as seen best in Fig. 6 of the drawings. It will be understood, however, that should the fire require the wider spacing of the sectors, this may readily be done,

using for such purpose the ordinary slice bar. If in the normal operation of the furnace, one or more of the sectors 39 become damaged or destroyed, it is obvious that the operation of replacing and removing the said sectors may be readily and conveniently performed.

As shown best in Fig. 5 of the drawings, each of the grate-bars 30 is provided with lateral inclines extensions 59. The lower edges of the extensions 59 are inclined to pins -19 and connector bars 28 and 29 within the limits of the slots 52.

lt is obvious that where the firebox in the furnace bein supplied is wide, a number of grate units such as above described may be employed, the said units, or the dogs 15 thereof being disposed side by side transversely in the fire-box, In each instance the dogs 15 are supplied with a coping 60, which is best shown in Figs. 3 and 6 of the drawings. The upper head of the coping 60 1s undulated in correspondence with the un dulatory design of the assembled sectors 39. By means of this arrangement, uniformity of service of a number of fire bearing sections may be maintained.

Claims:

1. A fire grate, comprising a swinging cross bar having an arc of movement; supporting members mounted on said cross bar and resting thereabove; a plurality of grate bars pivotally mounted on said supporting members; means connecting said grate bars at points removed from the pivot center thereof, said means embodying manuallyoperative reciprocating mechanism extending beyond the area of said fire grate; a plurality of fire-bed-supporting sectors removably mounted on said grate bars; means carried by said sectors for spacing the same each from the other; and a plurality of rider bars interposed between said grate bars to maintain the spaced relation thereof.

2. A fire grate, comprising a swinging cross bar having an arc of movement; supporting members mounted on said cross bar and resting thereabove; a plurality of grate bars pivotally mounted on said supporting members; means connecting said grate bars at points removed from the pivot center thereof, said means embodying manuallyoperative reciprocating mechanism extending beyond the area of said fire grate; a plurality of fire-bed-supporting sectors removably mounted on said grate bars; means carried by said sectors for spacing the same each from the other; and a plurality of rider bars removably supported by said grate bars, said rider bars having curved recesses to engage said grate bars to maintain the same in spaced relation while permitting them to rock on said supporting members.

8. A fire grate, comprising a swinging cross bar having an arc of movement; supporting members mounted on said cross bar and resting thereabove; a pluralit T of grate bars pivotally mounted on said supporting members; means connecting said grate bars at points removed from the pivot center thereof, said means embodying manuallyoperative reciprocating mechanism extending beyond the area of said fire grate; a plurality of fire-bedsupporting sectors reiovably mounted on said grate bars; means carried by said sectors for spacing the same each from the other; and a plurality of curved ridges mounted on said supporting members, engaging said grate bars to regulate the movement thereof.

4E. A fire grate, comprising a swinging cross bar having an arc of movement; supporting members mounted on said cross bar and resting thereabove; a plurality of grate bars pivotally mounted on said supporting members; means connecting said grate bars at points removed from the pivot center thereof, said means embodying manuallyoperative reciprocating mechanism extending beyond the area of said fire grate; a plurality of fire-bed-supporting sectors removably mounted on said grate bars; means carried by said sectors for spacing the same each from the other; a plurality of rider bars interposed between said grate bars to maintain the spaced relation thereof; and means mounted on said rider bars for engaging the swinging supports of said cross bar, to be retained in operative position thereby.

5. A fire grate comprising a swinging cross bar having an arc of movement; supporting members mounted on said cross bar and resting thereabove; a plurality of grate bars pivotally mounted on said supporting members; means connecting said grate bars at points removed from the pivot center thereof, said means embodying manuallyoperative reciprocating mechanism extending beyond the area of said fire grate; a plurality of fire-bed-supporting sectors removably mounted on said grate bars; means carried by said sectors for spacing the same each from the other; a plurality of fire dogs supporting said cross bar and pivotally connected therewith; and stop members mounted on said dogs to determine the service position of said grate bars.

6. A fire grate, comprising a swinging cross bar having an arc of movement; supporting members mounted on said cross bar and resting thereabove; a plurality of grate bars pivotally mounted on said supporting members; means connecting said grate bars at points removed from the pivot center thereof, said means embodying manuallyoperative reciprocating mechanism extending beyond the area of said fire grate; a plurality of fire-bedsupporting sectors removably mounted on said grate bars; means carried by said sectors for spacing the same each from the other; a plurality of fire dogs supporting said cross bar and pivotally connected therewith; stop members mounted on said dogs to determine the service position of said grate bars; and coping members mounted upon said dogs to cover the pivotal connection between said dogs and said cross bar.

7 A fire grate, comprising a swinging cross bar having an arc of movement; supporting members mounted on said cross bar and resting thereabove; a plurality of grate bars pivotally mounted on said supporting members; means connecting said grate bars at points removed from the pivot center thereof, said means embodying manuallyoperative reciprocating mechanism extending beyond the area of said fire grate; a plurality of fire-bed-supporting sectors removably mounted on said grate bars; means 1 carried by said sectors for spacing the same each from the other; a plurality of fire dogs supporting said cross bar and pivotally connected therewith; stop members mounted on said dogs to determine the service position of said grate bars; and coping members mounted upon said dogs to cover the pivotal connection between said dogs and said cross bar, the upper edge of said coping members being shaped in correspondence With said sectors to preserve uniformity of the supporting surface of said grate.

In testimony whereof I have signed my name to this specification in the presence of tWo subscribing Witnesses.

HENRY BENTON.

WVitnesses JAMES S. RAMSEY, ELWooD W. PHARES.

Copies 0! this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. G. 

